package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    //新增员工
    @Override
    public Employee add(EmployeeDTO employeeDTO) {
        Employee employee = Employee.builder()
                .name(employeeDTO.getName())
                .username(employeeDTO.getUsername())
                .password(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()))
                .phone(employeeDTO.getPhone())
                .sex(employeeDTO.getSex())
                .idNumber(employeeDTO.getIdNumber())
                .status(StatusConstant.ENABLE)
                .build();
        employeeMapper.addEmployee(employee);
        return employee;
    }

    //分页查询
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        Page<Employee> page = PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        employeeMapper.pageQuery(employeePageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    //启用、禁用
    @Override
    public void updateStatus(Integer status, Long id) {
        employeeMapper.updateStatus(status, id);
    }

    //根据id查询员工
    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }

    //修改员工
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = Employee.builder()
                .id(employeeDTO.getId())
                .name(employeeDTO.getName())
                .username(employeeDTO.getUsername())
                .phone(employeeDTO.getPhone())
                .sex(employeeDTO.getSex())
                .idNumber(employeeDTO.getIdNumber())
                .build();
        employeeMapper.updateEmployee(employee);
    }

    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        passwordEditDTO.setNewPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
        employeeMapper.updatePassword(passwordEditDTO);
    }

}
